零价铁催化降解2,4-二叔丁基苯酚的试验研究  

Experimental Investigation into Degradation of 2,4-Di-Tert-Butyl-Phenol Catalyzed by Zero Valent Iron

作　　者：高乃云[1] 刘雪飞[1] 周恭明[1] 汪琼芳[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《华南理工大学学报（自然科学版）》2016年第6期83-89,97,共8页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家科技重大专项(2012ZX07403-001;2012ZX07403-002;2008ZX07421-002);国家自然科学基金资助项目(51178321);高等学校博士学科点专项科研基金资助项目(20120072110050)~~

摘　　要：采用零价铁(Fe0)激活过硫酸盐(PS)产生SO-4·,氧化降解水中的2,4-二叔丁基苯酚(DTBP).通过改变零价铁初始投加量、PS初始浓度、初始p H值、温度等因素,探索这些因素对DTBP降解效果的影响,并且比较了紫外光(UV)、Fe0以及Fe^(2+)对DTBP的催化降解效果.结果表明:DTBP的降解速率随着Fe0投加量由0.5 mmol/L提高到4.0 mmol/L而加快,当投加量提高到5.0 mmol/L时则会发生抑制作用;当DTBP溶液中PS的浓度由0.125 mmol/L提高至0.500 mmol/L时能够加快DTBP的降解速率,但是进一步增大PS的浓度会使DTBP的降解速率先降后升;Fe0催化降解DTBP的速率随着溶液初始p H值的升高而逐渐减小;热激活PS体系中,提高温度对激活PS降解DTBP的效果有限,当温度升高至55℃时,60 min内仅有42%的DTBP被降解;当温度从35℃升高到45℃时,在热激活PS和Fe0/PS体系中,DTBP的降解速率均发生轻微的下降;相较UV和Fe^(2+),Fe0能够持续稳定地催化降解DTBP,在60 min内完成98%的最大降解率,且从经济性和节能方面考虑也占有优势.Zero valent iron （Fe^0） was used to activate persulfate （PS） to generate SO4^- ·and thus to oxidize the 2,4-di-tert-butyl-phenol （DTBP） in water. Then, the degradation of DTBP at various initial Fe^0 dosage, initial PS concentration, initial pH value and temperature was investigated, and the effects of ultra violet light （UV） , Fe^0 and Fe^2＋ on the degradation were analyzed in a comparative way. The results indicate that （1） the degradation of DTBP accelerates when the Fe^0 dosage increases from 0. 5 to 4. 0 mmol/L, while an inhibition may occur when the dosage reaches 5.0 mmol/L; （2） the increase in PS concentration from 0. 125 to 0. 500 mmol/L in DTBP solution can accelerate the degradation of DTBP, but the degradation velocity firstly decreases and then increases when the PS concentration continuously increases; （3） the velocity of Fe^0-catalyzed degradation for DTBP gradually decreases with the increase of the initial pH value; （4） temperature has no obvious effect on the activation of PS in degrading the DTBP in a heat-activated PS system, and only 42% of DTBP is degraded within 60 rain at 55 ℃; （5） when the temperature increases from 35 to 45 ℃ , the degradation velocity of DTBP decreases slightly in both the heat- activated PS and the Fe^0/PS systems; and （6） as compared with UV and Fe^2＋ , Fe^0 performs a consistent catalytic degradation effect on DTBP, and helps to achieve the highest degradation efficiency of 98% within 60 min, also, the Fe^0-activated degradation is more economical and environmentally friendly.

关 键 词：2 4-二叔丁基苯酚 零价铁 过硫酸盐 催化降解 

分 类 号：X52[环境科学与工程—环境工程] R123.6[医药卫生—环境卫生学]